检索结果-南通市图书馆

Electronic energy loss and ion velocity correlation effects in track production in swift-ion-irradiated LiNbO_(3):A quantitative assessment between structural damage morphology and energy deposition

引用

Journal of Materials Science & Technology 2022年第21期116卷 30-40页

作者： xinqing han Qing Huang Miguel L.Crespillo Eva Zarkadoula Yong Liu Xuelin Wang Peng Liu Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityQingdao 266237China Shanghai Institute of Applied Physics Chinese Academy of Sciences(CAS)Shanghai 201800China Centro de Micro-Análisis de Materiales(CMAM) Universidad Autónoma de MadridMadrid E-28049Spain Materials Science&Technology Division Oak Ridge National LaboratoryOak RidgeTennessee 37831USA

The primary motivation for studying how irradiation modifies the structures and properties of solid materials involves the understanding of undesirable phenomena,including irradiation-induced degradation of components in nuclear reactors and space exploration,and beneficial applications,including material performance tailoring through ion beam modification and defect *** this work,the formation mechanism of latent tracks with different damage morphologies in LiNbO_(3)crystals under 0.09-6.17 Me V/u ion irradiation with an electronic energy loss from 2.6-13.2 ke V/nm is analyzed by experimental characterizations and numerical ***-induced damage is preliminarily evaluated via the prism coupling technique to analyze the correlation between the dark-mode spectra and energy loss profiles of irradiated *** the irradiation conditions of different ion velocities and electronic energy losses,different damage morphologies,from individual spherical defects to discontinuous and continuous tracks,are experimentally *** ion penetration process,the ion velocity determines the spatiotemporal distribution of deposited irradiation energy induced by electronic energy loss,meaning that the two essential factors including electronic energy loss and ion velocity coaffect the track *** inelastic thermal spike model is used to numerically calculate the spatiotemporal evolutions of energy deposition and the corresponding atomic temperature under different irradiation conditions,and a quantitative relationship is proposed by comparison with corresponding experimentally observed track damage *** obtained quantitative relationship between irradiation conditions and track damage provides deep insight and guidance for understanding the damage behavior of crystal materials in extreme radiation environments and selecting irradiation parameters,including ion species and energies,for ion beam technique application in atom

关键词： Latent track damage Thermal spike model Electronic energy loss Velocity effect Ion modification

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Structural damage response of lanthanum and yttrium aluminate crystals to nuclear collisions and electronic excitation:Threshold assessment of irradiation damage

引用

Journal of Materials Science & Technology 2021年第31期90卷 95-107页

作者： Yong Liu xinqing han Qing Huang Miguel L.Crespillo Peng Liu Eva Zarkadoula Xuelin Wang Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityQingdao 266237China Shanghai Institute of Applied Physics Chinese Academy of Sciences(CAS)Shanghai 201800China Department of Materials Science&Engineering University of TennesseeKnoxvilleTN 37996United States Materials Science&Technology Division Oak Ridge National LaboratoryOak RidgeTN 37831United States

A comparative analysis is performed on the structural damage response and associated mechanisms in lanthanum aluminate and yttrium aluminate crystals under various irradiation conditions by a combination of experimental and theoretical *** low-energy Au~+irradiation,the damage accumulation curve shows a higher damage rate for LaAlO_(3)crystals than YAlO_(3)*** relatively low irradiation tolerance of LaAlO_(3)to the action of nuclear collisions is ascribed to the large amorphization cross-section and effective cross-section for defect-stimulated *** swift Ar^(12+),Ni^(19+)and Kr^(17+)irradiation with different ion energies and velocities,the formed highly-disordered/amorphous latent tracks with different morphologies in pristine and predamaged crystals are discussed,and the corresponding electronic energy loss and lattice temperature thresholds are quantitatively *** to YAlO_(3),LaAlO_(3)exhibits lower sensitivity and higher damage tolerance to the electronic energy loss process,attributing to its relatively high recrystallization efficiency during the rapid quenching ***,the introduction of lattice defects into LaAlO_(3)and YAlO_(3)crystals considerably enhances the sensitivity and intensity of thermal spike response to the electronic energy loss,and the induced effective modification of track morphologies demonstrates the synergistic effect between the electronic energy loss and pre-existing defects created by nuclear *** this case,even under the action of electronic energy loss below the threshold,the lattice temperature in the nuclear-collision damaged crystalline system could still meet the criterion for track *** irradiation energy deposited to atoms and induced lattice temperature evolution discussed in this work provide a deeper insight into the complex processes involved in irradiation-induced latent track behaviors.

关键词： Nuclear energy loss Electronic energy loss Synergistic effect Irradiation damage Latent ion track

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

能坡法流量实时在线自动监测系统在沈丘水文站的应用

引用

水文 2017年第1期37卷 79-82页

作者：韩新庆河南省周口水文水资源勘测局河南周口466000

能坡法流量实时在线自动监测系统结合计算机处理、网络数据传输等先进技术,可以将常规的水文要素监测方式转变为信息采集、存贮、传输运用为一体的自动化、数字化过程。通过该系统在沈丘水文站的应用,与流速仪法测流进行对比分析,从而... 详细信息

能坡法流量实时在线自动监测系统结合计算机处理、网络数据传输等先进技术,可以将常规的水文要素监测方式转变为信息采集、存贮、传输运用为一体的自动化、数字化过程。通过该系统在沈丘水文站的应用,与流速仪法测流进行对比分析,从而验证了能坡法流量实时在线自动监测系统的可靠性与合理性。

关键词：能坡法模型应用对比分析

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

生态技术在周口市农村水污染防治中的应用

引用

江淮水利科技 2010年第3期 5-7页

作者：韩新庆河南省周口水文水资源勘测局河南周口466000

农村水污染是由农业生产方式不合理,乡镇企业环保措施不足及农村居民的环保意识薄弱,生活方式不合理等因素构成。针对这一突出问题,我们要从农村水环境自身特点入手,对症下药,通过发展生态农业,推广生态养殖,加快农村污水处理系统建设,... 详细信息

农村水污染是由农业生产方式不合理,乡镇企业环保措施不足及农村居民的环保意识薄弱,生活方式不合理等因素构成。针对这一突出问题,我们要从农村水环境自身特点入手,对症下药,通过发展生态农业,推广生态养殖,加快农村污水处理系统建设,推广垃圾无害化处理,发展农村沼气建设等方式,使农村水环境得到有效保护和改善,以达到农村经济社会协调发展。

关键词：生态技术农村水污染防治

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

大型综合医院检验科使用后评价

引用

中国医院建筑与装备 2021年第1期22卷 132-134页

作者：韩信强董福松山西白求恩医院山西医学科学院太原030032

以运行了9年的山西白求恩医院检验科为实例,对其科室功能布局、空调与排风系统以及给排水系统、检验科内装饰三个方面进行使用后评价,总结经验和教训,并提出相关建议。

关键词：大型综合医院检验科功能布局使用后评价

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

NaOH预处理香菇废弃物对铜、锌吸附性能研究

引用

工业安全与环保 2018年第7期44卷 92-95页

作者：马培张庆甫吴佳韩新庆河南工程学院郑州451191 周口水文水资源勘测局河南周口466000

本研究用NaOH预处理后的香菇废弃物作为吸附材料,处理含铜、锌的重金属废水。研究了吸附时间、pH值、初始金属离子质量浓度、香菇废弃物质量浓度等因素对预处理后香菇废弃物吸附铜、锌离子的影响。结果表明:预处理后香菇废弃物对铜和锌... 详细信息

本研究用NaOH预处理后的香菇废弃物作为吸附材料,处理含铜、锌的重金属废水。研究了吸附时间、pH值、初始金属离子质量浓度、香菇废弃物质量浓度等因素对预处理后香菇废弃物吸附铜、锌离子的影响。结果表明:预处理后香菇废弃物对铜和锌的吸附平衡时间均为10 min;对铜和锌吸附的最佳pH值范围分别为5~7和5~6,其中对锌的吸附率在pH=2~4的范围内也能保持在87%左右。当香菇废弃物质量浓度大于4 g/L,铜/锌的吸附率均不再增大;吸附动力学实验表明,伪二级动力学模型能够很好地拟合预处理后香菇废弃物对铜和锌的动力学吸附过程,相关系数R2均为0.999 9;热力学分析表明,香菇废弃物对铜和锌的吸附热力学过程用Langmuir和Freundlich等温吸附模型均能较好地描述。Langmuir模型拟合结果显示,预处理后香菇废弃物对铜和锌的理论最大吸附量分别为8.993 mg/g和20.16 mg/g。

关键词：铜锌吸附动力学吸附热力学

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Impact of EBG Structures' Positions on the Performance of an EBG Antenna

引用

Journal of Beijing Institute of Technology 2017年第1期26卷 95-99页

作者： Zijian han Wei Song xinqing Sheng Center for Electromagnetic Simulation School of Information and ElectronicsBeijing Institute of TechnologyBeijing 100081China

Six circularly polarized patch antennas with electromagnetic band gap（EBG）arranged at different locations were *** EBG antennas were compared in terms of impedance bandwidth,axial ratio（AR）bandwidth and radiation *** the EBG cells were placed closer to the edge of the substrate,the EBG antenna had a larger front radiation and a narrower *** the EBG cells closer to the center of the patch resulted in a wider impedance bandwidth,a wider axial ratio bandwidth and a decreased front gain.

关键词： electromagnetic band gap (EBG) structure circularly polarized patch antenna imped-ance bandwidth

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

“生命尊严”系列讨论之二:生殖性克隆是否冒犯人的尊严

引用

中国医学伦理学 2017年第9期30卷 1089-1093页

作者：张新庆杨同卫韩跃红贺苗詹心怡北京协和医学院人文学院北京100730 山东大学医学心理学与伦理学系山东济南250012 昆明理工大学人文社会科学学院云南昆明650504 哈尔滨医科大学人文社会科学学院黑龙江哈尔滨150081 中国人民大学哲学院北京100872

在上期的生命尊严讨论中，我们围绕“人的尊严”的含义、适用范围、尊严与权利关系展开探讨，从多角度解释了尊严的丰富内涵、类型和表现。本期开始将从克隆人、终末期病人、代孕者等特定人群，试图渐进地揭开“生命尊严”的神秘面纱。

关键词：生命尊严生殖性克隆犯人终末期病人克隆人

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

High-Gain and Low-RCS Patch Antenna Array Based on Slot-EBG Structure

引用

Journal of Beijing Institute of Technology 2019年第4期28卷 750-755页

作者： Zijian han Wei Song xinqing Sheng Wenbo Zheng Center for Electromagnetic Simulation School of Information and ElectronicsBeijing Institute of TechnologyBeijing 100081China

A novel low radar cross-section(RCS)and high gain patch antenna array is proposed.A pair of slots introduced on the mushroom electromagnetic bandgap(EBG)patch realize polarization-dependency and act as parasitic radiation to enhance the antenna gain.A chessboard-like configuration composed of slot-EBG blocks is further equipped on the antenna array for scattering *** the layout pattern enables the designing of a high-gain and low-RCS antenna array using the ***-wave simulations validate that a front gain enhancement of more than *** in the operating frequency band and low-RCS in a broad frequency band for normal incidence are obtained by the proposed antenna array.

关键词： patch antenna array radar cross-section(RCS) front gain

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Microstructure of ultrahigh carbon martensite

引用

Progress in Natural Science:Materials International 2018年第6期28卷 749-753页

作者： Chao Wang Yulin Chen Jingyun han Dehai Ping xinqing Zhao School of Materials Science and Engineering Beihang University School of Materials Science and Engineering Dalian Jiaotong University

Recent experimental investigations suggest that the martensite formed by quenching carbon steels(0.2–1.26 mass %C) are composed of twins and nanoscale ω particles in twin boundaries, rather than carbon supersaturated uniform solutions. In order to probe the microstructure of the martensite with ultrahigh carbon content, a novel strategy is employed in the present study to obtain ultrahigh carbon martensite(approximate2.1 mass %C) by quenching ductile cast iron. The microstructure of the martensite was intensively characterized by high resolution transmitting electron microscopy. It is indicated that the microstructure of the ultrahigh carbon martensites is composed of ultrafine {112} -type twins and high-density nano-scaled ω particles embedded in twin boundaries. These ω nanoparticles in twin boundaries could remarkably impede the deformation of the movement of the nanotwins in martensites, leading to poor ductility and strength of the quenched ductile cast iron. These findings not only reveal the substructures of ultrahigh carbon martensite, but also enhance the understanding of the mechanical behavior of high carbon steels and ductile cast irons.

关键词： Ultrahigh carbon martensite Ductile cast iron Nanotwin ω phase

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：